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Commercial Reverse osmosis Plant - 2000 LPH to 2 lakhs liters per hour

Commercial Reverse osmosis Plant - 2000 LPH to 2 lakhs liters per hour

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Sequencing batch reactor( SBR )

The Sequencing Batch Reactor (SBR) –

 

Sewage Treatment Plant designed as per the following Process;

The Process is carried out in an alternating

  • aerobic/anoxic/Aerobic conditions by a batch process 
  • filling (introducing the raw sewage water),
  • aeration (for bacterial respiration),
  • settling (solids separation) and
  • decanting (final effluent evacuation and removal)

The Raw Sewage water from the industry is collected in Collection Tank and from the collection tank the sewage flows by gravity to Screen chamber for the removal of  the Floating & Big size particles. Then the Sewage water is pumped to the Equlization tank for complete mixing of the sewage water. Then it is pumped to the SBR Tank, where the process is carried out through following sequence in  4 hour cycle.

 

During this sequence, the mixed raw sewage water is entered into the reactor where the twin lobe blower is provided in this tank for the supply of oxygen and this enhance the activated sludge process in this system. The microorganism present in the Aeration tank, takes food from the wastewater and oxygen in the atmosphere metabolizes soluble organic matter to form the settleable organic matter.   Following the aeration process, the air is shut off for about 1 – 2 hours and the flow is diverted to the other settling zone maintaining the MLSS concentration of 5000 – 6000 mg/l.

A tranquil condition is maintained in the main aeration zone for efficient sludge settling. During this period, anoxic /anaerobic condition is take place for denitrification and phosphorous removal. After effective settling, the clarified supernatant water is decanted as the final treated water without disturbing the settled sludge.

The treated water is send to the treated collection tank where the treated effluent is disinfected using chlorine by dosing sodium hypochloride. After chlorine dosing, the Sewage water is pumped to the sand and Activated Carbon Filter for final removal fine suspended solids.

Since the new activated sludge is formed during each aeration process, the excess sludge is taken to sludge drying beds, then after it is dried and removed as manure.  The treated water shall have the following characteristics, which also meet the Tamil Nadu State Pollution Control Board (TNPCB) Standards and finally the treated effluent is used in the industrial premises for gardening purpose and Reused in Flush tanks.

 Treated Sewage Quality:-

The Treated water shall meet the Tamil Nadu Pollution Control Board (TNPCB) Norms and Standards

                        pH             6.0 – 9.0
                   Odour           Absent
                    BOD         < 20 mg /l
                   COD        < 250 mg / l
              Chlorides        <1000mg/l
            Oil & Grease         <10 mg/l
    Total Suspended Solids         <30 mg/l
    Total Dissolved Solids        <2100mg/l